Arc-lamp.



J. L. DINSMOOR.

ARC LAMP APPLICATION r1120 NOV. 14. 1912.

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ARC LAMP.

APPLICATION FILED NOV. 14, 1912.

1,208,517. I Patented Dec.12,1916.

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JOHN L. DINSMOOR, OF BROOKLYN, NEW YORK, ASSIGNOR T0 CLARISSA. B. DINS'lYUI QB OF WINDHAM, NEW HAMPSHIRE.

ARC-LAMP.

Specification of Letters Patent.

Patented Dec. 12, 1916.

Application filed November 14, 1912. Serial No. 731,326.

T 0 all 'whOm it may concern:

Be it known that I, JOHN L. DINSMOOR, a citizen of the United States, residing in the city of New York, borough of Brooklyn, county of Kings, and State'of New York,

have invented a certain new and useful Arc Lamp, of which the following is a specification.

This invention is an arc lamp of that class wherein the carbons are positioned in downwardly converging relation. and it pertains, more particularly, to'a simple and efficient means for feeding the carbons lineally and simultaneously.

A distinguishing feature of the invention is a solenoid plunger capable of an axial turning movement in addition to its ordinary reciprocating movement, and' a feed rod positioned in axial alinement with, and so connected to, the plunger that it will partake of its turning and reciprocating movements. Cooperating with the feed rod is a crosshead to which are connected the carbon holders,

and this crosshead is adapted to move downward by gravity for the purpose of feeding the carbons in like manner. Said downward movement of the crosshead and the carbons is intermittently effected by the feed rod, in other words, the crosshead is movable with the feed rod when the latter is drawn upwardly with the solenoid plunger for lifting the carbons in striking the are, but as the carbons burn away and the arc resistance increases, the plunger settles slowly and the carbons are permitted to approach each other until such a point is reached that the cross head must drop down to a lower position relative to the feed rod. Said crosshead and the feed rod cooperate to secure a step by step feed of the crosshead for lowering said crosshead and the carbons, and this is secured by providing cams or other pro-- jectio-ns on the feed rod, which cams or projections act in conjunction with suitable faces on the crosshead. With the plunger and feed rod in a certain operative position,

the crosshead is restramed by one cam or projection from movement relative to the rod, but as the plunger descends to a certain point and the feed rod and plunger are turned to a certain position, then the cam is moved to a clear position and the crosshead and carbons are permitted to descend by gravity, thus moving the crosshead relative to the feed rod and dropping down for a distance equivalent to one step.

Other features of the invention and the advantages thereof will appear from the following detailed description.

In the accompanying drawings, I have illustrated different embodiments of the invention, but the constructions shown therein are to be understood as illustrative, only, and not as defining the limits of the invention.

Figure 1 is an elevation looking in one direction at a lamp embodying the present invention, certain parts being shown in section. Fig. 2 is an elevation looking at the right of Fig. 1, certain parts being shown in section. Fig. 3 is a horizontal section on the line 33 of Fig. 2. Fig. 4 is a detail view in side elevation illustrating another construction of feed rod. Fig. 5 is a cross section on the line 5--5 of Fig. 4. Fig. 6 is a diagram of the lamp circuit.

A suitable frame is provided for sup- "porting and guiding the operative parts of the feed mechanism. As shown, the frame consists of a top plate A, a bottom member B, and a series of inclined rods C C, said inclined rods being secured firmly to the top plate A and bottom member B, thus resulting in a rigid or firm framework.

E E designate the carbon holders slidably fitted on inclined rodsC C of the framework, each carbon holder embodying a plate having recesses e at the respective ends thereof, which recesses are fitted loosely to the inclined rods, whereby the carbon holders and the carbons therein are directed for vertical movement in a predetermined path.

Each carbon holder is provided with a.

socket e in which is secured the upper part of a downwardly inclined carbon X, the lower ends of said carbons passing through suitable openings or slots in bottom member B- The feed of the carbons is controlled by v cooperative lower part the latter is reciprocated in a vertical direction. lln one embodiment of this part of the invention the plunger is provided with a spiral groove 9 in which operates a stud or friction roller 9' supported in a relatively fixed position on top plateA by a plate g which is shown as being secured at g to the top plate. Obviously, the movement of plunger F in an .upward direction will result in stud or roller g riding in spiral groove 9 and impart the turning movement in one direction to plunger F, but as the plunger drops or falls by gravity, stud or roller g traveling in groove 9 will turn said plunger in an opposite direction, whereby the plunger is capable of a conjoint reciprocating and rotary motion.

H designates a feed rod composed of different material from plunger F and attached or united directly to said plunger. The feed rod depends from the plunger in axial alinement therewith, said feed rod extending centrally and longitudinally with the frame. The feed rod is reciprocable and rotatable with the plunger, but this feed rod is loosely supported at its lower end within the frame for the purpose of retaining said feed rod in relation to crosshead I. The of the feed rod is shownas hav- 7 which fits loosely in a guide ing a stem wlthin the frame and member h supported near the lower part thereof. The stem h is free to rise and fall and to turn within the guide member, and this stem cooperates with the guide in retaining the lower part of the feed rod inproper position.

Crosshead T extends horizontally across the frame between guide rods C C, said crosshead cooperating with feed rod H and supporting the weight of the carbons X, whereby the crosshead and the carbons are adapted for movement in a downward direction under the force of gravity. The cross head is retained from horizontal movement within the frame by suitable means; as shown the crosshead is slidable vertically on the feed rod. The carbon holders E E are loosely connected with crosshead I. As shown, said carbon holders are provided with upstanding rollers j, and beneath these rollers are slidably fitted the respective end portions of crosshead I, said rollers and holders being free to slide on the crosshead. it will be noted that crosshead T is fitted slidably feed rod Til so as to be directed in a predetermined vertical path, whereas the carbon holders are tted slidably to the downwardly converging rods, the latter 0 crating to direct the carbon holders and t e carbons in predetermined converging paths. The rollers of the carbon holders operate to loosely connect said carbon holders to the crosshead for movement simultaneously with it, and these rollers being free to work upon the ends of the crosshead, allow the carbon holders to have limited movement inward and outward of the crosshead to compensate for the angular position of the guide rods C C.

In the form of construction shown in Figs. 1, 2 and 3, feed rod H is provided with two series of pins or studs 76 Z, and crosshead I is provided with a slot m having a central enlargement 0. The enlargement of the slot accommodates the feed rod, but the slot itself permits the crosshead to move relative to the feed rod and one or the other of the studs is Z thereof. The studs of one series are at an angle to the studs Z of the other series, and the studs are spaced apart vertically along the length of the rod so that the crosshead will be controlled to impart a step by step feed to the carbons.

The form of the projections on the feed rod is capable of variation in the manner shown in Figs. 4 and 5, wherein the feed rod H is shown as having cam-shaped projections is Z, each projection being provided with two reverse bevels on the top surface and two similar bevels on the bottom surface, but these cam-shaped projections are the mechanical equivalents of the studs k Z, for the reason that said cam-shaped projections cooperate with the crosshead in controlling the downward feed thereof with the step by step movement. In addition to performing the main function described, the cam-shaped projections 70 Z present sharp or knife edges which cooperate with similar knife edges provided on the walls of slot m in the crosshead, the knife edges of the slot and the cam-shaped projections operating to secure nicety in the feed of the carbons.

The coil F is connected in series with the carbons, and with the parts in their idle positions, carbons X are lowered so that their points will meet a recess provided in bottom member B. The flow of current through the lamp energizes coil F, the magnetism of-which acts on plunger said plunger, rod H, and crosshead l, the latter acting to raise carbon holders E E simultaneously and for equal distances, whereby carbons X are moved lengthwise and simultaneously for the purpose of separating the points of the carbons and striking the arc. Upon the upward movement of plunger F under the action of the coil, stud or roller 9 imparts a partial turning movement to the plunger, and this turning and reciprocating movement is co .municated to feed rod H, and the projections or cams thereon, but when striking the arc the plunger and the feed rod are not rotated for a suflicient distance when the plunger is lifted to release the crosshead. Accordingly, it is to be understood that in striking the arc the feed rod and the crosshead are moved upwardly with the plunger for a suflicient F to lift so slow as to be imperceptible to the eye When the carbons are sufliciently burned away to establish an abnormal arc resistance, the magnetic" intensity of the coil is correspondingly decreased and the plunger is permitted to sink down to a still lower position, whereupon the stud or roller g acts to impart a further turning movement to the plunger and the rod, thus bringing one of .the studs, as k, into alinement with slot m of the crosshead, whereupon the weight of the crosshead, the carbon holders, and the rods effects a downward movement of crosshead I relative to the feed rod H, such downward movement taking place until the crosshead is brought into engagement with the next stud Z, the latter thus acting to limit the further downward movement of the crosshead and the carbons. The carbons are thus fed by gravity in a downward direction and moved in predetermined inclined paths, whereupon the magnetic intensity of the coil is increased and the plunger is lifted to raise the crosshead and the carbons, thus restoring the-arc to normal value. The mechanism now continues to act as described, with the second named stud in engagement with the crosshead, so that said stud and crosshead will be under the control of the plunger; but upon further decrease in the magnetic intensity in the coil, the plunger is lowered by gravity to a certain point and is rotated by the action of stud g on cam groove 9 so that the second stud will be shifted to a position in line with the slot in the crosshead, whereupon the crosshead will drop down to a still lower position and thus engage with the third stud or pin, the operations being repeated as before.

From the foregoing description it is apparent that the crosshead and the'carbons are movable with the plunger for the purpose of imparting to the carbons a slow and gradual feed the crosshead and the carbons being raised with the plunger and the feed rod so as to travel therewith but as the carbons burn away the plunger is rotated to a position wherein the crosshead and the car: bons are permitted to drop by gravity a limited distance with respect to the feed rod, thus imparting to the crosshead and the carbons a downward movement equal to the distance between two studs or cams of the feed rod. The downward movement of the cross head the carbons takes place in step by step order, but in the intervals between the downward step feed of the carbons an\ the crosshead the parts are raised and lowered by the action of the plunger, the feed rod and the studs.

Having thus fully described the invention, what I claim as new, and desire to secure by Letters Patent is:

1. In an arc lamp, the combination with a solenoid and a reciprocating plunger, of means for axially turning said plunger simultaneously with the reciprocating movement thereof, carbon carriers, and feed means actuated by the turning movement of the plunger for permitting a step by step move- -ment to said carbon carriers.

2. In an arc lamp, the combination with a solenoid and a reciprocating plunger, of means cooperating with said plunger and actuated by the reciprocating movement thereof for imparting an axial turning movement to said plunger, means for supporting a carbon, and feed means controllable by the turning movement of the plunger for imparting a step by step feed to said carbon.

8. In an arc lamp, the combination with a solenoid and a reciprocating plunger, of a feed member depending from said plunger and reciprocable therewith, means for imparting an axial turning movement to the feed member simultaneously with its reciprocating movement, a carbon holder, a gravity operated member cooperatingv with said carbon holder, and means operable by the depending feed member for limiting the gravity operated member and the carbon holder to a step by step movement.

4. In an arc lamp, the combination with a solenoid and a reciprocating plunger, of a feed member reciprocable with said plunger, an electrode-actuating member movable vertically with the plunger and the feed member, means for imparting a turning movement to the feed member simultaneously with its reciprocating movement, and eooperating devices on the feed member and the electrode actuating member for releasing and locking the latter at successive intervals 110 to effect the feed of the electrode with a step by step movement.

solenoid and a reciprocating plunger, of

means for imparting an axial turning movement to said plunger, a feed rod reciprocating and turning with said plunger, a transverse carbon supporting member, and means on the feed rod cooperating with said transverse member for locking and releasing the latter to the feed rod, said transverse member being movable vertically with the plunger when locked to-the feed rod and being free to descend by gravity for a limited distance when released from such locking engagement with said feed rod.

6. In an arc lamp, the combination wlth a solenoid and a reciprocating plunger, .of means for imparting a rotative movement to said plunger, a carbon supporting member,

and means operated by the turning movement of the plunger for effecting a locking and releasing connection of said carbon supporting member with said plunger, said carbon supporting member being movable vertically with said plunger when locked thereto and when released therefrom being free to feed the carbon by gravity for a limited distance.

7. In an arc lamp, the Combination with means for supporting carbons in downward converging relation and for guiding said carbons in a constant predetermined path, of a member connected with carbon supporting means, a solenoid, a reciprocating plunger,

means for imparting rotative movement to said plunger simultaneously with its reciprocating movement, and cooperating devices for locking and releasing said member to the 2 plunger, said cooperating devices acting to simultaneously permit movement to the carbons in the direction of their length and for equal distances.

8. ln an arc lamp, the combination with a carbon-supporting member, and a solenoid,

of a feed member, means controllable by the solenoid for imparting rotative and reciprocating'movement to said feed member, and

locking and releasing means eoiiperating with the feed member and the carbon-supporting member, said carbon supporting member being locked to said feed member for partaking of the reciprocating movement thereof and said carbon-supporting member being released by the rotative movement of said feed member so as to be free to travel by gravity for a limited distance relatively to said feed member.

9. In an arc lamp, the'combination with a carbon-controlling member, and a solenoid, of a feed member, means controllable by the solenoid for, imparting rotative and reciproeating movement to said feed member, and a series of locking members carried by said feed member, said locking members being engageable with said carbonsupporting member and adapted by the rotative movement of the feed member to intermittently release the carbon-controlling member.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' JOHN L. DINSMUOR. Witnesses: H. I. BERNHARD, M. Q'Ronnrepna. 

